Apparatus for producing corrugated tubes.



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A. POGANY & LAHMANN. APPABATUS FOR PRODUCING CORRUGATED TUBES. APPLICATION FILED MAY 14,1909.

Patented Apr. 13, 1909.

mvswrfins [IMAM/4 0 ATT RNEY 1n: unmet: Flu-Rs co., WASHINGTON, 34c.

UNTTET) eTATES PATENT ()FFTCE.

ALEXANDER POGANY, OF BUDAPEST, AND HEINRICH LAHMANN, OF KOMOTAU, AUSTRIA- HUNGARY.

APPARATUS FOR PRODUCING CORRUGATED TUBES.

' Application filed May 14,

To all whom it may concern:

Be it known that we, ALEXANDER PoeANr, a suect of the King of Hungary, and a resident of Budapest, Austria-Hungary, and

T'TEINRICH LAHMANN, a sub ject of the .tiing of grussia, and a resident of homotau, Austria- Hungary, have invented a new and useful Apparatus for Producing Corrugated Tubes; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the ac companying drawings, and to letters of reference marked thereon, which form a part of this description.

This invention relates to the manufacture of corrugated tubes. it has been suggested to corru ate tubes by means of a tool fitted with rol er According to another method portions of the circumference of the tube are provided with corrugations between two swaging dies so that corrugations running around the circumference of the tube have to be produced in several stages. it has also been proposed to corrugate tubes by means of a die and mandrel respectively formed with internal and externaf threads. In practice, long and expensive threaded mandrels are necessary for this method, and a jamming of the tube on the mandrel frequently occurs, thus rendering the removal of the tube, which is elfectod by unscrewing it, very diiiicult or impossible.

The essential feature of the prcsent invention is that the tube is rotated on the sta tionary mandrel during the corrugating operation and is thus advanced or fed through the die so as to subject further parts of the 4 tube to the operation and prevent jamming of the tube on the mandrel.

An apparatus for carrying out the invention according to one mode is shown in the accompanying drawing.

A mandrel b is fixedly mounted at one end from the die (it, in a suitable frame 0. The mandrel is provided at the end which enters the opening of the die d, with a few helical threads corresponding to the corrugations to 50 be produced, the length of which threads is the same as that of the dies.

According to one form of construction Specification of Letters Patent.

Patented April 13, 1909.

1908. Serial No. 432,812.

the die is constructed in two parts and its parts have female threads on the inside corresponding to the corrugations in the mandrel.

The tube a is provided with a handle 6, which is clamped on to the tube for rotating the same. The die at is mounted in a guidesaddle or yoke fastened or dovetailed in the bed or anvil of a steam-hammer the upper part of the bi-partito die resting loosely on the lower part or on the guide-saddle so that it may be raised to a certain extent so as to allow of the passing through of the tube.

The process of corrugating the tube is effected by operating the hammer, the tup of the hammer striking on the upper half of the die (Z. The tup is therefore not connected with the latter. The tube (t is slightly rotat-ed during the striking of the hammer until the required length of corrugated tube is ob tained.

As the tubes to be corrugated according to the present process possess at the commencement an inside diameter which is larger than the outside diameter of the mandrel the tube may be easily rotated on the mandrel and drawn oil from the same.

The corrugation process of the tube is worked cold. The die may also be operated by other mechanical means instead of using a steam hammer and the die may also consist of more than two parts. The rotation of the tube on the mandrel may also be offected mecl'ranically.

Having now particularly described and as certained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:

1. In apparatus for corrugating tubes, a die to form external and a mandrel to form internal threads upon the tube, in combinal, tion with means to turn the tube on the man- 1 drel, said nandrel being stationary during the corrugatmg process, and means to press said die upon the tube.

l 2. In apparatus for corrugatiug tubes, at '5 die having separable parts threaded to form l l l l external threads upon the tube passing be tween said parts, a mandrel threaded to cooperate with said die to form internal threads on said tube, in combination with means to turn the tube upon said mandrel, the latter being stationary during the corrugating process, and means for pressing said die into the tube.

3. In an apparatus for corrugating tubes, the combination of a die and a mandrel respectively provided With internal and external threads, a frame for bearing the man drel and the tube and means for rotating the tube upon the mandrel, the latter being stationary during the corrugating process, substantially as described.

4. In an apparatus for corrugating tubes, the combination of a die constructed in two parts, said parts having female threads on the inside, a mandrel threaded to cooperate With said die, a frame for hearing the manl drel and the tube and means for rotating the tube on the mandrel the latter bein sta- I 7 O tionary during the corrugatmg process, substantially as described.

5. In an apparatus for corrugating tubes, the combination of a threaded mandrel, a die constructed in two parts, said parts having female threads on the inside corresponding to the corrugations in the mandrel, a yoke l bearing the parts of the die and fastened in f the anvil of a steam. hammer, the upper part g of the bi-partite die resting loosely on the lower part, a frame for bearing the mandrel and the tube and a handle for rotating the l tube on the mandrel, substantially as del scribed.

l 6. In apparatus or corrugating tub-es, a threaded mandrel stationary during the corl rugating process and around which the tube is rotated, in combination with means c06perating with said mandrel to form external and internal corrugations on the tube, substantially as described.

1 1 names to this specification, in the presence of E two subscribing witnesses.

ALEXANDER POGANY. HEINRICH LAI'IMANN.

l Vitnesses:

FRANZ WALURTANY, llUDoLF JooHr.

In testimony whereof We have signed our 

